-1/2 a^{c1,c2}_{c0,a0} b^{c4,a1}_{c3} gamma1^{a0}_{a1} a+(c0) a+(c3) a-(c4) a-(c2) a-(c1)
+1/2 a^{c0,c1}_{c3,a0} b^{c3,a1}_{c2} a+(c2) a+(a0) a-(a1) a-(c1) a-(c0)
+1/2 a^{c0,c1}_{c3,a0} b^{c3,a1}_{c2} gamma1^{a0}_{a1} a+(c2) a-(c1) a-(c0)